Sleuthing X windows bug in Ubuntu Gutsy

On Sat, 29 Mar 2008, Roger Bivand wrote:

 > On Sat, 29 Mar 2008, Tim Keitt wrote:
 >

 >> On Sat, Mar 29, 2008 at 10:25 AM, Tim Keitt <tkeitt at gmail.com> wrote:

 >>>
 >>> On Sat, Mar 29, 2008 at 10:01 AM, Tim Keitt <tkeitt at gmail.com> wrote:

 >>>>
 >>>> On Sat, Mar 29, 2008 at 8:41 AM, Roger Bivand <Roger.Bivand at nhh.no> wrote:

 >>>>> On Fri, 28 Mar 2008, Tim Keitt wrote:
 >>>>>

 >>>>>> I'm trying to see if I can track down a bug in X windows that causes
 >>>>>> it to crash when plotting (I believe) very small filled polygons (or
 >>>>>> it may have to do with large numbers of polygons). I first noticed
 >>>>>> this running QGIS. Loading a PostGIS layer with ~3K polygons will
 >>>>>> cause X to abort. I can load the layer if I have already zoomed into a
 >>>>>> smaller region of the coverage. Once I try to zoom out to the full
 >>>>>> extent, X dies.
 >>>>>>
 >>>>>> So I tried loading the polygons into "sp" using "readOGR" which works
 >>>>>> great. I could then plot the polygons, no problem. But when I called
 >>>>>> "spplot" which I believe fills the polygons, same problem. X crashes.
 >>>>>>
 >>>>>> Can anyone confirm this behavior? Try plotting a large number of
 >>>>>> polygons with spplot and also try very small polygons (less than a
 >>>>>> pixel size). I can send around the shapefile if anyone is interested.
 >>>>>> It contains GSHHS coastlines for Micronesia.

 >>>>>
 >>>>>  I can't reproduce any problems on
 >>>>>
 >>>>>  http://www.census.gov/geo/cob/bdy/co/co00shp/co99_d00_shp.zip
 >>>>>
 >>>>>  library(rgdal)
 >>>>>  usc <- readOGR(".", "co99_d00")
 >>>>>  # OGR data source with driver: ESRI Shapefile
 >>>>>  # Source: ".", layer: "co99_d00"
 >>>>>  # with  3489  rows and  9  columns
 >>>>>  plot(usc, col=rainbow(52)[usc$state1])
 >>>>>  spplot(usc, "STATE", col.regions=rainbow(52))
 >>>>>
 >>>>>  and:
 >>>>>
 >>>>>  $ xdpyinfo
 >>>>>  name of display:    :0.0
 >>>>>  version number:    11.0
 >>>>>  vendor string:    The X.Org Foundation
 >>>>>  vendor release number:    60802000
 >>>>>  X.Org version: 6.8.2
 >>>>>  ...
 >>>>>  screen #0:
 >>>>>    dimensions:    1280x1024 pixels (361x271 millimeters)
 >>>>>    resolution:    90x96 dots per inch
 >>>>>    depths (7):    16, 1, 4, 8, 15, 24, 32
 >>>>>
 >>>>>  Could you please make your file available - maybe there is something
 >>>>>  particular about it? Is there way of asking X which driver it is using
 >>>>>  (here nvidia proprietary for Legacy GPU version (1.0-71xx series), full
 >>>>>  details in /proc/driver/nvidia)?

 >>>>
 >>>>  I'll put the file someplace where it can be downloaded.

 >>>
 >>>  OK. It is at http://www.keittlab.org/~tkeitt/melanesia.tgz. I just
 >>>  confirmed loading this file into QGIS 0.9.2-rc2 reproduces the X
 >>>  crash. I'll test the same under Hardy shortly (requires a chroot).
 >>>
 >>>  THK
 >>>
 >>>
 >>>

 >>>>
 >>>>  This has happened on my desktop using both nvidia and vesa drivers and
 >>>>  on my laptop with the intel driver.

 >>
 >> I just confirmed the same bug under Hardy Heron again using QGIS
 >> 0.9.2-rc2. I'll try with "spplot" next.

 >
 > I'll try melanesia on my system, please try the US counties shapefile on
 > yours.

 The melanesia shapefile does not cause any problems on my system as
 documented earlier with spplot(). I guess that your X(s) is/are fresher
 than mine, but trying on another Linux system (F7, X.org 1.3.0, intel
 driver) shows no problems either, I'm afraid.

 Roger

 >
 > Roger
 >

 >>
 >> THK
 >>

 >>>>
 >>>>  THK
 >>>>
 >>>>

 >>>>>
 >>>>>  Roger
 >>>>>

 >>>>>>
 >>>>>> THK
 >>>>>>
 >>>>>>

 >>>>>
 >>>>>  --
 >>>>>  Roger Bivand
 >>>>>  Economic Geography Section, Department of Economics, Norwegian School of
 >>>>>  Economics and Business Administration, Helleveien 30, N-5045 Bergen,
 >>>>>  Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
 >>>>>  e-mail: Roger.Bivand at nhh.no
 >>>>>
 >>>>>

 >>>>
 >>>>
 >>>>
 >>>>
 >>>>
 >>>> --
 >>>>  Timothy H. Keitt, Assistant Professor
 >>>>  University of Texas at Austin http://www.keittlab.org/
 >>>>  Contact info and schedule at http://www.keittlab.org/~tkeitt/
 >>>>  Please support open document formats http://opendocument.xml.org/
 >>>>

 >>>
 >>>
 >>>
 >>>  --
 >>>  Timothy H. Keitt, Assistant Professor
 >>>  University of Texas at Austin http://www.keittlab.org/
 >>>  Contact info and schedule at http://www.keittlab.org/~tkeitt/
 >>>  Please support open document formats http://opendocument.xml.org/
 >>>

 >>
 >>
 >>
 >>

 >
 >

 --
 Roger Bivand
 Economic Geography Section, Department of Economics, Norwegian School of
 Economics and Business Administration, Helleveien 30, N-5045 Bergen,
 Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
 e-mail: Roger.Bivand at nhh.no